RT Journal Article SR Electronic T1 Vaccination against human papillomavirus JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1525 OP 1525 DO 10.1503/cmaj.1070123 VO 177 IS 12 A1 Ferenczy, Alex YR 2007 UL http://www.cmaj.ca/content/177/12/1525.1.abstract